Vulcanizing apparatus.



W. H. WELOH.

I VULOANIZING APPARATUS. APPLICATION FILED MAR. 16,1907.

2 I 923,224, Patented June 1, 1909.

2 SHEETS-SHEET 2.

To all whom it may concern:

" WELCH, a subject of the King of Great Britlowing is a specification.

, press or clamp in which the portion of the tire to be repaired can be placed under presof. and Fig.

' vulcanizen threaded to receive a hand-screw B. lower end of this screw engages with a presserranged so that the side pillars act as guides for it. Beneath the presser-plate U is a botvided with an internal spiral groove E to re .ceive projecting pins F of a plug F. Tins .ingheated by an electric current.

the rest of the apparatus so that it can be I heat without altering the strength of the current by the use of a variable resistance.

frame com )rising' a top plate and side pillars.

LONDON. ENbrLAND. ASSIGNOR TO HARVEY FROST & PONIPAYY, LIMITED, OF LONDON. ENGLAND.

VULCANIZING APPARATUS.

Specification of Letters Patent.

Patented June 1, 1909.

Application filed March 15, 1907. Serial No. 362,645.

Be it known that I, WALTER HENRY ain, residing at l ion don. in England, have invented cert am new and useful improvements in Vulcanrzmg Apparatus, of which the fol- This invention relates to portable vulcanizingapparatus suitable for use in repairing tires and the like, and the object of the invention is to .rovide apparatus of this character with heating devices having a novel and improved arrangement for regulating the degieeof heat in the vulcanizing surfaces.

The apparatus according to this invention is heated electrically and is in the form of a sure, one or both of the pressing surfaces ber The heating device is movable relatively to brought nearer to or farther away from the material to be vulcanized, and this movement all'ords a ready means-for ad usting the In the accompanying drawingsFigure 1 is an elevation, partly in section, showing one form of portable vulcanizer according to this invention; Fig. 2 is a )lan of a portion there- 3 is an elevation, partly in seetion, of a portion of an, alternative form of l-Vith reference first to Figs. 1 and 2, A is a The top p ate is provided. with a boss A The plateC which is recessed or otherwise artom plate 1 one end of which is provided witha hole D through which one of the side pillars passes while the other end is formed with ahook D to engage with a neck A formed on the other side pillar. in the center of the bottom plate I) is a sleeve E proplug, is the heating member of the press and i is provided with an electrical conductor G- co.' ed within the plug and embedded in a move up or down relatively to the surface of the plate 1) supporting the work, and hence the amount of heat can be regulated.

In the construction shown in Fig. 3, the plug F, instead of being screwed, is arranged to slide vertically in guides E extending downward from the plate D. Rotation is prevented by a feather F on the plug which engages with a groove on the one guide. In this construction, instead of mounting the terminals H on the plug itself, they are at-' tached to the guides E and by way of example the conductor G is shown as having one end attached to the terminal H and the other joined to the frame by the sliding contact between the feather F 2 and its guide.

The shape of the presser-plate and the bottom or swinging plate may be made to suit the particular class of work for which it is intended, for instance, the presser-plate might have its under surface concave and the lower plate be made correspondingly convex so as to suit the outer cover of a tire.

l urther, the presser-plate may be arranged to be heatedelectrically instead of the lower plate, or, on the other hand, both may be heated in this way.

What I claim as my invention and desire to secure by Letters Patent is- 1. In a portable vulcanizing apparatus, the combination of a vulcanizing plate engaging the work, a heating, body adjustable toward and from the plate to vary its heating effect thereon, and means for heating said body. internally.

2. In a portable vulcanizing' ap aratus, the combination of a vuleanizing plate engaging the work, and an electrically heated body arranged to heat the plate and adjustable toward and from the plate to vary its heating effect thereon without varying the flow of heatingcurrent.

3. In a portable vulcanizing apparatus,

the combination of a vulcanizing plate engaging the Work, an electrically heated body stantially perpendicular thereto, a plug slidable in the sleeve to adjust its distance from the support, and an electrical heating coil for the plug.

5. In a portable vulcanizing apparatus,

, the combination of a frame comprising a top plate and side pillars attached thereto, a

work-supporting plate pivotally attached to one of said pillars and detachably engaged with the other pillar, a hollow boss on said plate having a spiral groove Within it, a plug fitting in said boss and having a pin adapted to engage with the groove therein, an electrical heating coil in said plug, a presser plate movable relatively to the frame, and a screw working in the top plate and operating the presser plate, substantially as set forth. In testimony whereof I have signed my name to this specification in the presence of two subscribing Witnesses.

\VALTER HENRY WELCH. Witnesses:

C. B. HoRroN,

E. M. TOLERTON. 

